The ones I follow. Pretty sure there's more but I don't feel like searching now...
Acrobatic Gymnasts:
Douglas Fordyce, retired base, men pair, GBR Link Removed
Edward Upcott, retired top, men pair, amaaaazing gymnast, GBR Link Removed
Jonathan Stranks, top for Men's Group, GBR Link Removed
Sienna Martinez, top for Women's Group, USA Link Removed
Kellianne Stankus, top for Mixed Pair, USA Link Removed
Rhythmic Gymnasts:
Link Removed
Link Removed
Artistic Gymnasts:
Link Removed
Becka Downie Link Removed
Gymnastics Problems and funny stuff:Link Removed
Link Removed
Link Removed
Gymnastics Federations:
Brazilian Federation Link Removed
British Link Removed
Diver: (okay, not gymnast, but worth it)
Link Removed